To use any of these key combinations, press and hold the keys immediately after pressing the power button to, or immediately after your Mac begins to restart. Keep holding until the described behavior occurs. If your Mac is using a, all of these key combinations are disabled, except as noted below. Command (⌘)-R: Start up from the built-in system. Or use Option-Command-R or Shift-Option-Command-R to start up from macOS Recovery over the Internet., depending on the key combination you use while starting up. If your Mac is using a, you're asked to enter the password. Option (⌥): Start up to, which allows you to choose other startup disks or volumes, if available. If your Mac is using a, you're asked to enter the password.

Option-Command-P-R: or PRAM. If your Mac is using a, it ignores this key combination or starts up from macOS Recovery. Shift (⇧): Start up in. D: Start up from the built-in or utility, depending on your Mac model. Or use Option-D to start up from this utility over the Internet. N: Start up from a compatible, if available. To use the default boot image on the NetBoot server, hold down Option-N instead.

Don't support this startup key. Command-S: Start up in. This key combination requires. T: Start up in. Command-V: Start up in. Eject (⏏) or F12 or mouse button or trackpad button: Eject removable media, such as an optical disc.

How To Boot In Safe Mode For Mac

How to Restart a Mac Computer If your Mac desktop or Mac laptop is acting sluggish or programs are failing to run, you need to know how to restart your Mac computer. Restarting or rebooting your Mac essentially clears your computer’s memory and starts it up fresh.

When you restart your computer, your Mac closes all running programs and offers to save any files you’re working on. After you choose to save any files, your Mac will finally boot up again. To restart a Mac computer, you have three choices:. Press the power button (or press Control+Eject) and, when a dialog box appears, click the Restart button.

Choose the Apple key and then click Restart. Press Control+Command+Eject (or Control+Command+Power button). Pressing the Control+Command+Eject/Power button is the most reliable way to restart a Mac because it doesn’t rely on the Mac OS X operating system. Restarting a Mac computer isn’t the same as turning the computer on and off, which completely resets it. If you really want to make sure that your computer starts up correctly, turn it off, wait a few seconds, and then turn it on again. If you’re in a hurry, try restarting your Mac, and if that doesn’t fix the problem, you’ll have to turn it off and on again.

If your, restarting might not work. If your Mac is generally acting weird, restarting isn’t your only option. Macs are known not to need a lot of maintenance or troubleshooting, but if restarting (or rebooting) doesn’t work, consider some other basic.